We can manufacture gliding windows that will open in both direction. Customers that choose those generally have the intent of having either the full screen, so the view is always comparable through each pane... or they have the intent of removing each of the panels for the warmer months.
You can also match step without oversizing a joist. Joist sizing is most often determined using the live and static load specifications.
The largest factors that we come across are architectural.
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